CWnd::OnSysColorChange
The framework calls this member function for all top-level windows when a change is made in the system color setting.
Syntax
afx_msg void OnSysColorChange( );
Remarks
Windows calls OnSysColorChange for any window that is affected by a system color change.
Applications that have brushes that use the existing system colors should delete those brushes and re-create them with the new system colors.
Requirements
Header: afxwin.h